9-227 Section 923. Water M ain Materials
923.01 General
Materials for water main work must meet the requirements of this section, American Water Works Association (AWWA ) specifications, and the requirements of the water main owner ( municipality).
923.02 Pipe
The Department considers lines 2 inches or less in diameter to be water services, not water mains . Water service pipe must be Type K copper . The minimum water service size is 1 inch. Water main must be ductile iron pipe manufactured in accordance with ANSI/AWWA C150/A21.50 and C151/A21.51. Pipe must be lined with a standard thickness , cement -mortar lining sealed with a bituminous seal coat in accordance with ANSI/AWWA C104/A21.4. The outside of the pipe must be coated with the standard bituminous seal , and each length of pipe must be marked w ith the following information:
A.Metal thickness class;
B.Net weight of the pipe without lining;
C.Nominal size ; and
D.Manufacturer ’s identifying symbol. Provide “push on” joints . Provide gaskets meeting the requirements of AWWA C111/A21.11 . If shown on the plans, provide nitrile gaskets . For each joint, provide two serrated, silicon -bronze, electrical continuity wedges or an external conductor connection meeting the standards of the municipality. Provide ductile iron pipe and fittings with the standard joint restr aint system required by the municipality. Fittings, plugs, and gaskets for ductile iron pipe must meet the requirements of AWWA/ANSI C110/A21.10, ANSI/AWWA C111/A21.11 , and ANSI/AWWA C153/A21.53. Cement -mortar linings for fittings must meet the requirement s of ANSI/AWWA C104/A21.4.
923.03 Gate Valves
Provide resilient wedge valves for use in water distribution systems with a nominal diameter from 6 to 12 inches, rated for at least 200 psi . Valves must meet the requirements of AWWA C509.
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Source: Michigan Standard Specifications for Construction, 2020 Edition. Pages 1037–1037 of 1,146. View official source ↗